what's up with my timing? (log)

[vinh766]

i don't get it, i use to get timing to be at about 19 at higher rpms while tuning with just the s-afc. now that i have my maft installed, and giving myself the same 02's as before, my timing is much lower.

here is an old log while tuning with just the s-afc

rpm, timing, tps, o2
3272, 25, 29, .88
3404, 24, 30, .48
3532, 22, 30, .84
3684, 16, 84, 1.0
3924, 9, 84, 1.02
4196, 9, 85, 1.02
4484, 9, 87, 1.02
4708, 9, 91, 1.0
4980, 10, 96, 1.0
5252, 11, 97, 1.0
5500, 14, 97, 1.0
5788, 16, 97, .98
6008, 16, 97, .98
6220, 19, 97, .98
6440, 19, 97, .98
6620, 19, 97, .98
6820, 20, 3.54, .76


and this is my last run, with the maft set at 550's and fine tuning with the s-afc.

rpm, timing, tps, o2's
3288, 22, 36, .9
3440, 15, 45, .98
3684, 9, 55, 1.0
3980, 9, 88, 1.0
4288, 9, 88, 1.02
4584, 9, 89.19, 1.0
4884, 10, 90, 1.02
5160, 11, 90, 1.0
5460, 14, 91, 1.0
5736, 15, 93, 1.0
6000, 14, 97, 1.0
6232, 15, 97, .98
6464, 14, 97, 1.0
6676, 14, 97, .98
6832, 14, 3, .74
6748, 39, 2, .74


what am i doing wrong? should i be adding? or taking away fuel? TIA

 

[kyle h.]

there are a few things wrong with your car. first off, the TPS isn't going WOT, 97% is close to 100% but its not the same. Fix that.

Your o2s read supper rich, but you are getting bad timing. it looks like you're getting some knock around 3800rpm. why dont u log the knock next time.

now that i reread your post, i see that you're using MAFT. im not real familiar with it.

 

[Nos~4G63]

I think you are getting some knock. How much are you boosting?

 

[kpt4321]

Tune the car. There is nothing about a MAFT that magically removes timing, so after tuning you should be able to get the car exactly back where it was.

 

[vinh766]

im a 2g, so i can't read knock. i mostly just got the maft so that i can run it as a blow thru setup instead of recirculating the bov. and all i've done to it is to have it set at 550's so that i don't have to throw off my s-afc settings too much off wack. and i know im running pig rich, but it seems as though the more fuel i give it, the better the timing get. and about my tps, im pretty sure that 97% compared to 100 isn't going to throw my timing off like that. and i am currently running it at 20psi like i did in my old runs. oh, and it seems like im knocking at 3000k because that's where i go WOT. i just don't understand why the more fuel i give it, (even though its running rich already) the more it likes it.

 

[coltboostin]

Wayyyy to rich. Also need to see 100% on the TPS. Try again and them post results.

 

[slickster]

not tryint to hijack thread, but i think this may help him as well.......

If you know that say 93% reading for tps DOES correspond to wot (hence tps needs adjusting) Does it really affect the car in any way? Does the ecu act differently because of this?

ps. I know his says 97 but mine say 93

 

[exzercist]

my tps only says im at 94% how do i fix the tps to make it 99 or 100%???

 

[lowridin2g]

there are a few things wrong with your car. first off, the TPS isn't going WOT, 97% is close to 100% but its not the same. Fix that.

loggers are always 2-6% lower on the tps. mine also goes to 97 or 98% i believe. all u have to do is with the car off have a buddy step on the throttle all the way while u go under the hood and make sure the throttle body is opening all the way. i also watch my tps on my safc and its always at exactly 0% when off the throttle, and exactly 100% when wot. just something about those loggers and tps's.

 

[slickster]

I think the safc just takes the higest value that it sees, and calls that wot. It doesnt really know. So it should read 0-100%.
I am just curious if the ecu would act differently if i adjusted my tps to read 100% on the logger? If not, then why bother adjusting it?(given you know it is truly opening fully)